Sodium Bicarbonate → Tetrafluorophthalic anhydride

HRID 259945

Reaction equation

HRID 259945 reaction equation
[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[C:8]([F:13])=[C:4]([C:5](F)=[O:6])[C:3]=1[C:14](F)=[O:15].FC1(F)C2C(=C(F)C(F)=C(F)C=2F)C(=O)[O:19]1.C(=O)([O-])O.[Na+]>>[F:1][C:2]1[C:10]([F:11])=[C:9]([F:12])[C:8]([F:13])=[C:4]2[C:5](=[O:19])[O:6][C:14](=[O:15])[C:3]=12

Participants

4

Reactant 3

HCID 516892Sodium BicarbonateHCID 11032047Perfluoro-phthalideHCID 110756133,4,5,6-tetrafluorobenzene-1,2-dicarbonyl Fluoride

Product 1

HCID 69545Tetrafluorophthalic anhydrideYield 72.5%

Procedure

Into a 100 ml glass reactor equipped with a reflux condenser and a stirrer, 50 g (0.207 mol) of the mixture (1:1) of the 3,4,5,6-tetrafluorophthaloyldifluoride and the 3,3,4,5,6,7-hexafluoro-1-[3H]-isobenzofuranone of Example 2, and 17.4 g (0.207 mol) of sodiumhydrogen carbonate were charged, and the mixture was reacted at 130° C. for 5 hours with vigorous stirring. Then the reaction mixture was separated by distillation to obtain 33.0 g of tetrafluorophthalic anhydride. The yield was 72.5%.

Workup

  1. customInto a 100 ml glass reactor equipped with a reflux condenser and a stirrer
  2. customthe mixture was reacted at 130° C. for 5 hours with vigorous stirring
  3. customThen the reaction mixture was separated by distillation

Sources & evidence

ORD record
ord-efd75aaef873407fa53613f4019c6bc9
Source dataset
uspto-grants-1996_06
Patent number
US05523476

Linked notes

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